attribute history features are available via get_history(): http://docs.sqlalchemy.org/en/rel_0_8/orm/session.html?highlight=get_history#sqlalchemy.orm.attributes.get_history
However this history is only active until the next flush. I doubt it's appropriate as a substitute for implementing a GUI feature that illustrates pending changes (and possibly even supports "undo") over a span of a whole transaction, as flushes generally need to occur at any time before a query proceeds; otherwise, you're starting to architect your application around the behavior of your persistence system which is a fairly brittle dependency. My advice would be to build a system that tracks changes as they occur using attribute events: http://docs.sqlalchemy.org/en/rel_0_8/orm/events.html#sqlalchemy.orm.events.AttributeEvents and to link these events to a datastructure that ultimately can be referred to by the GUI on a per-field basis (this is essentially the classic "memento" pattern, http://en.wikipedia.org/wiki/Memento_pattern). On Feb 1, 2013, at 1:05 PM, [email protected] wrote: > No suggestions? > > On Wednesday, January 30, 2013 1:31:33 PM UTC-7, [email protected] wrote: > [...] > How can I determine what [attributes] has been changed, even after > a flush? (Or should I disable autoflushing?) > > How to revert some changes (but not all; for that I > would just do a rollback, yes?) > > -- > You received this message because you are subscribed to the Google Groups > "sqlalchemy" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/sqlalchemy?hl=en. > For more options, visit https://groups.google.com/groups/opt_out. > > -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sqlalchemy?hl=en. For more options, visit https://groups.google.com/groups/opt_out.
